Delta IV Heavy launch attempt now Saturday Jan. 17, 2009

[shuttle_guy]

<p>It was set for today.</p><p>If you are in Florida come over to KSC. If possible this is one you should not miss.</p><p>http://spaceflightnow.com/&nbsp;</p><p>&nbsp;</p> <div class="Discussion_UserSignature"> </div>

 

[docm]

<p>Webcast here....</p><p>100k&nbsp; 300k</p><p>The launch window is from 7:45 pm EST&nbsp;to 11:45 pm EST.</p><p>Wonder if it'll be on NASA TV? They mentioned a simulcast.</p><p>I love night launches <img src="http://sitelife.space.com/ver1.0/content/scripts/tinymce/plugins/emotions/images/smiley-cool.gif" border="0" alt="Cool" title="Cool" /></p> <div class="Discussion_UserSignature"> </div>

 

[MeteorWayne]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Webcast here....100k&nbsp; 300kThe launch window is from 7:45 pm EST&nbsp;to 11:45 pm EST.Wonder if it'll be on NASA TV? They mentioned a simulcast.I love night launches <br />Posted by docm</DIV><br /><br />SDC is reporting it has been postponed until tomorrow 7:45 PM.</p><p>http://www.space.com/missionlaunches/sfn-090113-delta4h-countdown.html</p> <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>

 

[rocketwatcher2001]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>SDC is reporting it has been postponed until tomorrow 7:45 PM.http://www.space.com/missionlaunches/sfn-090113-delta4h-countdown.html <br />Posted by MeteorWayne</DIV></p><p>I knew there was a reason that I got to come home a week early!&nbsp; I thought crew scheduling was just getting me home in time to see Battlestar Galactica, but with a Delta IV heavy tomorrow, well, yes, Virginia, there is a Santa Claus.</p> <div class="Discussion_UserSignature"> </div>

 

[tanstaafl76]

<p>Postponed until Thurs the 15th</p> <div class="Discussion_UserSignature"> </div>

 

[shuttle_guy]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Postponed until Thurs the 15th <br />Posted by tanstaafl76</DIV></p><p>&nbsp;</p><p>Today is the day....I Hope</p><p>http://spaceflightnow.com/delta/d337/status.html&nbsp;</p><p><br /><br />&nbsp;</p> <div class="Discussion_UserSignature"> </div>

 

[MeteorWayne]

Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>&nbsp;Today is the day....I Hopehttp://spaceflightnow.com/delta/d337/status.html <br />Posted by shuttle_guy</DIV><br /><br />The scheduled launch time is 7:41 PM EST (extracted from the article s_g linked to). <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>

 

[Boris_Badenov]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>&nbsp;Today is the day....I Hopehttp://spaceflightnow.com/delta/d337/status.html <br />Posted by shuttle_guy</DIV></p><p><font size="2">I sure hope it flies today, tomorrow I'll be out of town & won't be able to watch.</font><br /></p> <div class="Discussion_UserSignature"> <font color="#993300"><span class="body"><font size="2" color="#3366ff"><div align="center">. </div><div align="center">Never roll in the mud with a pig. You'll both get dirty & the pig likes it.</div></font></span></font> </div>

 

[tanstaafl76]

<p>Really impressive pictures of that thing being rolled out of its hangar. &nbsp;That payload must weigh an awful lot...</p><p>&nbsp;</p> <div class="Discussion_UserSignature"> </div>

 

[ThereIWas2]

Nope.&nbsp; Nitrogen valve still stuck. <div class="Discussion_UserSignature"> <p><span class="postbody"><span style="font-style:italic"><br /></span></span></p> </div>

 

[rybanis]

Argh! Oh well. I hope their problems get fixed quickly. <div class="Discussion_UserSignature"> </div>

 

[bpcooper]

<p>A new date will be determined at a meeting tonight:</p><p>&nbsp;</p><p>http://spaceflightnow.com/delta/d337/status.html </p> <div class="Discussion_UserSignature"> <p>-Ben</p> </div>

 

[MeteorWayne]

Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Nope.&nbsp; Nitrogen valve still stuck. <br />Posted by ThereIWas2</DIV><br /><br />Oh N2 (NOO&nbsp; <img src="http://sitelife.space.com/ver1.0/content/scripts/tinymce/plugins/emotions/images/smiley-laughing.gif" border="0" alt="Laughing" title="Laughing" />) <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>

 

[shuttle_guy]

<font size="3"><font face="Arial Unicode MS">Saturday evening will be the next attempt to launch the Delta 4-Heavy rocket on its classified satellite-deployment mission. Liftoff time is scheduled for 7:33 p.m. EST. </font></font><font size="3"><font face="Arial Unicode MS">The bleak weather forecast for Friday at Cape Canaveral led launch officials to forego taking a shot of counting down tomorrow. </font></font><p style="margin:0in0in0pt" class="MsoNormal"><font face="Times New Roman" size="3">http://spaceflightnow.com/delta/d337/status.html</font></p> <div class="Discussion_UserSignature"> </div>

 

[Testing]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Saturday evening will be the next attempt to launch the Delta 4-Heavy rocket on its classified satellite-deployment mission. Liftoff time is scheduled for 7:33 p.m. EST. The bleak weather forecast for Friday at Cape Canaveral led launch officials to forego taking a shot of counting down tomorrow. http://spaceflightnow.com/delta/d337/status.html <br />Posted by shuttle_guy</DIV></p><p>Thanks SG and good morning.<br /></p> <div class="Discussion_UserSignature"> </div>

 

[Boris_Badenov]

<font size="2">If it's Saturday I'll miss it, but that'll be okay. I just hope it launches successfully.</font>&nbsp; <div class="Discussion_UserSignature"> <font color="#993300"><span class="body"><font size="2" color="#3366ff"><div align="center">. </div><div align="center">Never roll in the mud with a pig. You'll both get dirty & the pig likes it.</div></font></span></font> </div>

 

[rybanis]

<p>Yeah, if I were in the area I would seriously be making an attempt to see it. I've heard the launch is quite a bit louder than you would expect...</p><p>&nbsp;</p><p>One thing I've always wondered with the Delta IV-H is just how they can get away with having such tiny connecting struts on the strap on boosters? I mean, obviously it works, but they look so fragile and weak. i guess the same could be said for the connections between the SRB's and the ET on the shuttle (and for that matter, the ET and the shuttle ittself).&nbsp; </p> <div class="Discussion_UserSignature"> </div>

 

[tanstaafl76]

<p>The only thing I can think of is Mighty Putty</p><p>&nbsp;</p> <div class="Discussion_UserSignature"> </div>

 

[rocketwatcher2001]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Yeah, if I were in the area I would seriously be making an attempt to see it. I've heard the launch is quite a bit louder than you would expect...&nbsp;<br />Posted by rybanis</DIV></p><p>What is weird is that the Delta IV heavy launch I saw a year ago was actually very quiet, and I was pretty close.&nbsp; I'm sure that was due to some odd atmospheric conditions, but I've been much further away from Delta II's that&nbsp;sounded a lot louder.</p><p>&nbsp;</p> <div class="Discussion_UserSignature"> </div>

 

[rybanis]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>What is weird is that the Delta IV heavy launch I saw a year ago was actually very quiet, and I was pretty close.&nbsp; I'm sure that was due to some odd atmospheric conditions, but I've been much further away from Delta II's that&nbsp;sounded a lot louder.&nbsp; <br /> Posted by rocketwatcher2001</DIV></p><p>Solid boosters must be the real noisemakers, then. Makes sense. </p> <div class="Discussion_UserSignature"> </div>

 

[bpcooper]

<p>Everything is relative to distance, weather (wind and humidity) and the rocket. Delta 4 medium and Delta 4-H are actually fairly impressive from the Port, eight miles away, because of their slow speed.</p><p>Solids aren't always louder from afar because they go faster. But Delta 2, for example, can be viewed in public from less than three miles away and thus are pretty impressive. </p><p>&nbsp;Having seen Delta 4-H from three miles I can tell you that it is the closest thing to the shuttle I have seen in an unmanned launchm, despite being a about a quarter the thrust. It was probably about as close to a Saturn 1B as I'll get.</p> <div class="Discussion_UserSignature"> <p>-Ben</p> </div>

 

[frodo1008]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Yeah, if I were in the area I would seriously be making an attempt to see it. I've heard the launch is quite a bit louder than you would expect...&nbsp;One thing I've always wondered with the Delta IV-H is just how they can get away with having such tiny connecting struts on the strap on boosters? I mean, obviously it works, but they look so fragile and weak. i guess the same could be said for the connections between the SRB's and the ET on the shuttle (and for that matter, the ET and the shuttle ittself).&nbsp; <br /> Posted by rybanis</DIV></p><p>They can get away with it, as all three of the core boosters are all powered at the same thrust by the RS68 engine on the rear of each of the Common Booster Cores.&nbsp; This gives a whole lot less of a difference between each separate booster than the difference between the external tank and the orbiter and the SRB's on the shuttle, as the external tank is not so powered.&nbsp; So the entire weight of the external tank (which is a large part of the total weight of the entire shuttle system) has to be held by its struts during the ascent of the shuttle!</p><p>Does this explain why less robust struts are needed between the cores on the Delta IV? </p>

 

[rybanis]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>They can get away with it, as all three of the core boosters are all powered at the same thrust by the RS68 engine on the rear of each of the Common Booster Cores.&nbsp; This gives a whole lot less of a difference between each separate booster than the difference between the external tank and the orbiter and the SRB's on the shuttle, as the external tank is not so powered.&nbsp; So the entire weight of the external tank (which is a large part of the total weight of the entire shuttle system) has to be held by its struts during the ascent of the shuttle!Does this explain why less robust struts are needed between the cores on the Delta IV? <br /> Posted by frodo1008</DIV></p><p>&nbsp;</p><p>For the most part, yes. Perhaps I'm also just looking at the top - right below the nose cones on the strap-ons. Those attachments are very small. I haven't seen the brackets/struts/connections at the base of the booster...Would those be much stronger? </p> <div class="Discussion_UserSignature"> </div>

 

[shuttle_guy]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>&nbsp;For the most part, yes. Perhaps I'm also just looking at the top - right below the nose cones on the strap-ons. Those attachments are very small. I haven't seen the brackets/struts/connections at the base of the booster...Would those be much stronger? <br />Posted by rybanis</DIV></p><p>Yes, the majority of the loads are held by the aft struts. The fwd attach points essentially just float and are there to</p><p>keep the strap ons from pealing off.</p> <div class="Discussion_UserSignature"> </div>

 

[rybanis]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Yes, the majority of the loads are held by the aft struts. The fwd attach points essentially just float and are there tokeep the strap ons from pealing off. <br /> Posted by shuttle_guy</DIV></p><p>Okay, that makes total sense now. Yay. </p> <div class="Discussion_UserSignature"> </div>